Approved Suttons Seeds Retailer. Rosella produces delicious cherry-sized tomatoes with a dark, rosy-red hue. With a smoky flavour that adds the perfect touch to those summery salads, these cherry tomatoes have fewer seeds inside too – so kids will love them! We love the dark colour of this variety, and the fruits hang to form miniature tomato chandeliers that make them a pretty addition to any outside space (until you pick them for the plate of course). Growing Information Sow March-April for greenhouse growing (or April for outdoors) in a propagator on a windowsill or pots or trays in a greenhouse at 18-21°C (65-70°F) using a quality compost. Cover seeds with 6mm (¼") sieved compost. Germination 8-12 days. Transplant seedlings singly into 7.5cm (3") pots. Grow on, finally planting into large pots, grow bags or direct into the greenhouse border; or outdoors 45cm (18") apart when frost risk has passed. Feed regularly and side-shoot as necessary. Sowing - Cropping: 17-19 weeks.